Question
Which longitude is designated as the International Date
Line?Solution
The International Date Line (IDL) is located at approximately 180Ā° longitude, opposite the Prime Meridian (0Ā° longitude). It is not a perfectly straight line but zigzags to avoid dividing land areas and island groups. When crossing the IDL from east to west, a day is added to the calendar; when crossing from west to east, a day is subtracted. This imaginary line serves as the point where the date changes by one day when crossed.
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